Forces only exist as a result of an interaction. Whenever there’s an interaction between two objects—a climber and a sheer rock face, for instance—there’s a force upon each of the objects. Contact forces are the types of forces that result when the two interacting objects are perceived to be physically contacting each other. So, it’s simple science that we’d make a versatile, can-do shoe that fully embraces the laws of physics; thus, the Force X. Continue reading...